Free · no sign-up · Q2 2026

Which funds own OGN

Organon & Co in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $10m between them. It is among the largest positions of fewer than a fifth of the current managers on file. Buying and selling roughly cancelled this quarter, which is what a name looks like when the argument is still live.

Managers holding: 2; at least, of 91 current
Combined value: $10m; as reported
Opened: 1; new this quarter
Added to: 0; already held
Trimmed or sold out: 3; 2 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Winton Group Ltd Quantitative · $3.1bn book	$6.9m	0.2%	509,862	opened509,862	New
PDT Partners LLC Quantitative · $1.9bn book	$3.1m	0.2%	230,275	+$1.5m-47,132	Trimmed

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

MFS Investment Management · Long-only$10m held before
Bridgewater Associates LP · Macro$3.6m held before

Ownership through time

At least 3 of the 95 managers whose filings are on file listed OGN in Q2 2026, against 9 in Q2 2021. 1 manager more than in Q1 2026: 2 started positions; 1 no longer listed it among the positions read, which can mean a holding below the listed range or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

Man Group PLC$57m
Winton Group Ltd$6.9m

Largest increases, by shares

Man Group PLCnew: 4,180,500 shares+$57m
Winton Group Ltdnew: 509,862 shares+$6.9m

Largest decreases, by shares

PDT Partners LLC277,407 to 230,275 shares-$638k

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
Man Group PLC	Q2 2026	$57m	$57m
Winton Group Ltd	Q1 2022	$6.9m	$6.9m
PDT Partners LLC	Q4 2025	$3.1m	$3.1m
Janus Henderson Group Ltd	Q3 2021	$400m	last listed Q4 2023
MFS Investment Management	Q2 2021	$254m	last listed Q4 2025
AQR Capital Management LLC	Q3 2021	$109m	last listed Q3 2024
Millennium Management LLC	Q2 2025	$88m	last listed Q2 2025
Balyasny Asset Management LLC	Q2 2021	$54m	last listed Q2 2023
Berkshire Hathaway Inc	Q2 2021	$47m	last listed Q2 2021
Point72 Asset Management LP	Q4 2023	$46m	last listed Q4 2023
Arrowstreet Capital LP	Q2 2021	$37m	last listed Q2 2023
Glenview Capital Management LLC	Q3 2021	$25m	last listed Q3 2021
Woodline Partners LP	Q2 2021	$24m	last listed Q2 2024

What OGN is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around OGN →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Comps ExplorerValue it against the peers it trades beside Every managerRead any of these books in full Deal tapeWhat buyers paid for whole companies, not slices Hedge fund interviewsHow the room runs, and the stock pitch it wants

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The holdings, every quarter, and the week between

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